Adding the possibility to add a completionHandler for the reportNewIncomingCall. Which is usefull if you want to tell the pushkit you handled the VoIP notification only after the call was successfully reported.

Author: lrorthmann

ios/RNCallKeep/RNCallKeep.h

@@ -33,7 +33,8 @@ continueUserActivity:(NSUserActivity *)userActivity
                      hasVideo:(BOOL)hasVideo
           localizedCallerName:(NSString * _Nullable)localizedCallerName
                   fromPushKit:(BOOL)fromPushKit
-                      payload:(NSDictionary * _Nullable)payload;
+                      payload:(NSDictionary * _Nullable)payload
+        withCompletionHandler:(void (^_Nullable)(void))completion;
 
 + (void)endCallWithUUID:(NSString *)uuidString
                  reason:(int)reason;

ios/RNCallKeep/RNCallKeep.m

@@ -151,7 +151,7 @@ + (void)initCallKitProvider {
                              hasVideo:(BOOL)hasVideo
                   localizedCallerName:(NSString * _Nullable)localizedCallerName)
 {
-    [RNCallKeep reportNewIncomingCall: uuidString handle:handle handleType:handleType hasVideo:hasVideo localizedCallerName:localizedCallerName fromPushKit: NO payload:nil];
+    [RNCallKeep reportNewIncomingCall: uuidString handle:handle handleType:handleType hasVideo:hasVideo localizedCallerName:localizedCallerName fromPushKit: NO payload:nil withCompletionHandler:nil];
 }
 
 RCT_EXPORT_METHOD(startCall:(NSString *)uuidString
@@ -340,6 +340,7 @@ + (void)reportNewIncomingCall:(NSString *)uuidString
           localizedCallerName:(NSString * _Nullable)localizedCallerName
                   fromPushKit:(BOOL)fromPushKit
                       payload:(NSDictionary * _Nullable)payload
+        withCompletionHandler:(void (^_Nullable)(void))completion
 {
 #ifdef DEBUG
     NSLog(@"[RNCallKeep][reportNewIncomingCall] uuidString = %@", uuidString);
@@ -373,6 +374,9 @@ + (void)reportNewIncomingCall:(NSString *)uuidString
                 [callKeep configureAudioSession];
             }
         }
+        if (completion != nil) {
+            completion();
+        }
     }];
 }
 
@@ -383,7 +387,7 @@ + (void)reportNewIncomingCall:(NSString *)uuidString
           localizedCallerName:(NSString * _Nullable)localizedCallerName
                   fromPushKit:(BOOL)fromPushKit
 {
-    [RNCallKeep reportNewIncomingCall: uuidString handle:handle handleType:handleType hasVideo:hasVideo localizedCallerName:localizedCallerName fromPushKit: fromPushKit payload:nil];
+    [RNCallKeep reportNewIncomingCall: uuidString handle:handle handleType:handleType hasVideo:hasVideo localizedCallerName:localizedCallerName fromPushKit: fromPushKit payload:nil withCompletionHandler:nil];
 }
 
 - (BOOL)lessThanIos10_2